Mysterious
Pronunciation : Mys*te"ri*ous
Part of Speech : a.
Etymology : [F. myst?rieux. See 1st Mystery.]
Definition : Defn: Of or pertaining to mystery; containing a mystery; difficult or impossible to understand; obscure not revealed or explained; enigmatical; incomprehensible. God at last To Satan, first in sin, his doom applied, Thought in mysterious terms. Milton.
Syn. -- Obscure; secret; occult; dark; mystic; cabalistic; enigmatical; unintelligible; incomprehensible.
Source : Webster's Unabridged Dictionary, 1913